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Proficiency Testing

We offer Proficiency Testing products for a variety of testing schemes for both quantitative and qualitative test performance.
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UV254 Asorbance Drinking Water Inorganic Standard UV254 Asorbance Drinking Water Inorganic Standard
SKU: PEI-085

UV254 Asorbance Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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DMRQA Set 2 DMRQA Set 2
SKU: PEI-084K

DMRQA Set 2

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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DMRQA Set 1 DMRQA Set 1
SKU: PEI-083K

DMRQA Set 1

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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pH Drinking Water Inorganic Standard pH Drinking Water Inorganic Standard
SKU: PEI-083

pH Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Full DMRQA Set Full DMRQA Set
SKU: PEI-082K

Full DMRQA Set

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Residue (2 pack) Residue (2 pack)
SKU: PEI-079

Residue (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Silica Drinking Water Inorganic Standard Silica Drinking Water Inorganic Standard
SKU: PEI-073

Silica Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Inorganics Drinking Water Inorganic Standard Inorganics Drinking Water Inorganic Standard
SKU: PEI-041

Inorganics Drinking Water Inorganic Standard

  • CCL
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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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EPA Inorganics NPW Set EPA Inorganics NPW Set
SKU: PEI-037K

EPA Inorganics NPW Set

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  • Brand NSI
  • Raw Material >95% min
  • Certification Single: Grav. w/Analytical Confirmation
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Full NELAC Inorganics Set Full NELAC Inorganics Set
SKU: PEI-035K

Full NELAC Inorganics Set

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  • Brand NSI
  • Raw Material >95% min
  • Certification Single: Grav. w/Analytical Confirmation
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pH (2 pack) pH (2 pack)
SKU: PEI-035

pH (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Trace Metals (2 pack) Trace Metals (2 pack)
SKU: PEI-034

Trace Metals (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
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